#include <iostream>
using namespace std;
int akm(int m, int n) {
  if (m == 0) return n + 1;
  if (n == 0) return akm(m - 1, 1);
  return akm(m - 1, akm(m, n - 1));
}
int main() {
  int m, n;
  cin >> m >> n;
  cout << akm(m, n) << endl;
}